{"id":311,"date":"2018-02-09T16:18:21","date_gmt":"2018-02-09T16:18:21","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex50\/?page_id=311"},"modified":"2019-02-19T12:32:05","modified_gmt":"2019-02-19T12:32:05","slug":"hot-ice-weiz","status":"publish","type":"page","link":"https:\/\/heatpumpingtechnologies.org\/annex50\/case-studies-1\/hot-ice-weiz\/","title":{"rendered":"Hot Ice Weiz"},"content":{"rendered":"<div class=\"container container--no-margin classic-editor\">The construction of the MFH (multi-family building) which is located at B\u00e4rentalweg 6 in A-8160 Weiz was finished in April 2015. The building is a wood frame construction which accommodates ten different apartments on three floors. The total area adds up to 1477\u00a0m\u00b2, whereof an area of 957m\u00b2 is heated.<\/p>\n<p>It fulfils the passive house standard and has a calculated heat demand of 9.91\u00a0kWh\/(m\u00b2a).<\/p>\n<table style=\"height: 181px\" width=\"654\">\n<tbody>\n<tr>\n<td width=\"140\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-324 aligncenter\" src=\"\/annex50\/content\/uploads\/sites\/56\/2018\/02\/bild01-300x194.jpg\" alt=\"\" width=\"312\" height=\"202\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild01-300x194.jpg 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild01-768x497.jpg 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild01-1024x662.jpg 1024w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild01-400x259.jpg 400w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild01.jpg 1249w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><\/td>\n<td width=\"161\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-325 aligncenter\" src=\"\/annex50\/content\/uploads\/sites\/56\/2018\/02\/bild02-300x197.jpg\" alt=\"\" width=\"300\" height=\"197\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild02-300x197.jpg 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild02-768x503.jpg 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild02-400x262.jpg 400w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/bild02.jpg 1009w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #c00000\"><strong>Lessons learned\u00a0<\/strong><\/span><\/p>\n<ul>\n<li>Use of innovative heat source &#8211; ice storage connected with solar thermal absorbers works very well for multi -family buildings with very low energy demand (passive house standard).<\/li>\n<li>Comprehensive concept including PV modules lets increase the energetic independence of the buildings.<\/li>\n<li>Quality of the system\u2019s control is crucial.<\/li>\n<li>Compared to design data increased heat demand due to increased room temperature &amp; DHW consumption<\/li>\n<\/ul>\n<p><span style=\"color: #c00000\"><strong>Key facts<\/strong><\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td colspan=\"2\" width=\"300\" height=\"10\"><strong>Building <\/strong><\/td>\n<td width=\"19\"><strong>\u00a0<\/strong><\/td>\n<td colspan=\"2\" width=\"300\" height=\"10\"><strong>Heat pump and source<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Location<\/td>\n<td width=\"161\"><em>Weiz, Austria<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Number of HP<\/td>\n<td width=\"149\"><em>2<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Construction<\/td>\n<td width=\"161\"><em>2015<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Installed power<\/td>\n<td width=\"149\"><em>6 kW + 10kW<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Heat distribution<\/td>\n<td width=\"161\"><em>underfloor heating<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Operation mode<\/td>\n<td width=\"149\"><em>monoenergetic<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Heated area<\/td>\n<td width=\"161\"><em>957 m\u00b2 living<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Heat source<\/td>\n<td width=\"149\"><em>ice storage + solar<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Level of insulation<\/td>\n<td width=\"161\"><em>very good<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\"><\/td>\n<td width=\"161\"><em>\u00a0<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"300\"><strong>Heating system<\/strong><\/td>\n<td width=\"19\"><strong>\u00a0<\/strong><\/td>\n<td colspan=\"2\" width=\"300\"><strong>Domestic hot water <\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Heat demand<\/td>\n<td width=\"161\"><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Type of system<\/td>\n<td width=\"149\">central<\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Heating temperature<\/td>\n<td width=\"161\"><em>35 \u00b0C<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Max. temperature<\/td>\n<td width=\"149\"><em>60 \u00b0C<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\"><\/td>\n<td width=\"161\"><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\">Circulation system<\/td>\n<td width=\"149\"><em>yes<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\"><\/td>\n<td width=\"161\"><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"300\"><strong>Other information <\/strong><\/td>\n<td width=\"19\"><strong>\u00a0<\/strong><\/td>\n<td colspan=\"2\" width=\"300\"><strong>\u00a0<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Electric energy consumption 2016<\/td>\n<td width=\"161\"><em>16850 kWh<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">Investments costs<\/td>\n<td width=\"161\"><em>unknown<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<tr>\n<td width=\"140\">PV installation<\/td>\n<td width=\"161\"><em>yes<\/em><\/td>\n<td width=\"19\"><\/td>\n<td width=\"151\"><\/td>\n<td width=\"149\"><em>\u00a0<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #c00000\"><strong>Description of the technical concept<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-334 aligncenter\" src=\"\/annex50\/content\/uploads\/sites\/56\/2018\/02\/scematics-1-300x187.jpg\" alt=\"\" width=\"561\" height=\"349\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/scematics-1-300x187.jpg 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/scematics-1-768x479.jpg 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/scematics-1-1024x639.jpg 1024w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/scematics-1-400x249.jpg 400w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/scematics-1.jpg 1180w\" sizes=\"auto, (max-width: 561px) 100vw, 561px\" \/><\/p>\n<p>The heat provided from the solar collector can either be delivered to the ice storage via a heat exchanger or to the heat pumps. The heat pumps lift the heat to the desired temperature level. (Remark: Up to now, it is not possible to use heat from the solar collector directly to heat the DHW or the SH storage.)<\/p>\n<p>Depending on the current heating requirement, one or two heat pumps are in operation. They always work in one mode (DHW or SH storage, with priority on DHW) and ensure that the temperature in the storages remains within the desired range. If both heat sources (solar collector &amp; ice storage) are not sufficient, it is possible to heat the two storages with auxiliary heaters (electrical heating rods).<\/p>\n<p>During summer, this system can also be used for cooling. For this purpose, the ice storage is used directly as heat sink (\u201ccold source&#8221;) for \u201cpassive cooling\u201d, so that no chiller (reversible heat pump) is needed.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-342 alignnone aligncenter\" src=\"\/annex50\/content\/uploads\/sites\/56\/2018\/02\/unnamed.png\" alt=\"\" width=\"41\" height=\"41\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/unnamed.png 170w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/02\/unnamed-150x150.png 150w\" sizes=\"auto, (max-width: 41px) 100vw, 41px\" \/>\u00a0 <a href=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/56\/2018\/04\/20180323annex50bestpracticeaustriahoticeweiz-1.pdf\">Hot Ice Weiz data sheet <\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The construction of the MFH (multi-family building) which is located at B\u00e4rentalweg 6 in A-8160 Weiz was finished in April&#8230;<\/p>\n","protected":false},"author":7,"featured_media":0,"parent":236,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"class_list":["post-311","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/pages\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/comments?post=311"}],"version-history":[{"count":5,"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/pages\/311\/revisions"}],"predecessor-version":[{"id":1591,"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/pages\/311\/revisions\/1591"}],"up":[{"embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/pages\/236"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/annex50\/wp-json\/wp\/v2\/media?parent=311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}